rock elm

noun

1

a

: a tall widely distributed elm (Ulmus thomasii) of eastern North America that has broadly obovate leaves narrowing abruptly to a point, grayish deeply fissured bark, and light brown wood

b

: the strong tough durable springy wood of the rock elm

2

: slippery elm

3

: american elm

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!